Pugna

Use Nether Blast to secure ranged creep last hits and to damage opponents at the same time.

Use Decrepify to ruin last hits for the opponents.

You can Decrepify yourself or an ally in trouble and even attempt to teleport out.

Chip opponents' towers gradually with Nether Blast whenever you can if current mana allows it.

Life Drain instantly destroys basic illusions.

The full value burst spell combo would be: Nether Ward, Nether Blast, Decrepify quickly and begin Life Draining.

With Life Drain, you can restore health to an ally or mana if he's full health. Watch your health though.

Place Nether Ward close enough to opponents but out of their sight.

You can Decrepify yourself or anyone within range while channeling Life Drain.

Pugna's Nether Blast takes one second to explode. You can dodge it by moving away.

Be careful not to use high mana cost spells around Pugna's Nether Ward.

Look to interrupt Pugna's Life Drain by running away or by stunning or silencing him.

Pugna takes buildings down fast with Nether Blast. Organize defense quickly.

Spell immunity and magic resistance items are great against Pugna's magical damage.

A well timed Lotus Orb is great at countering Pugna's Decrepify and Life Drain combo.